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greybus: interface: clean up and rename init-status helper 

Clean up and rename the interface-init-status helper.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-03-29 18:56:02 -04:00 committed by Greg Kroah-Hartman
parent e12811eff7
commit 133e366bbe
1 changed files with 23 additions and 19 deletions
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42
drivers/staging/greybus/interface.c
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@ -11,55 +11,58 @@
/*
* T_TstSrcIncrement is written by the module on ES2 as a stand-in for boot
* status attribute ES3_INIT_STATUS. AP needs to read and clear it, after
* reading a non-zero value from it.
* T_TstSrcIncrement is written by the module on ES2 as a stand-in for the
* init-status attribute ES3_INIT_STATUS. The AP needs to read and clear it
* after reading a non-zero value from it.
*
* FIXME: This is module-hardware dependent and needs to be extended for every
* type of module we want to support.
*/
static int gb_interface_read_and_clear_boot_status(struct gb_interface *intf)
static int gb_interface_read_and_clear_init_status(struct gb_interface *intf)
{
struct gb_host_device *hd = intf->hd;
int ret;
u32 value;
u16 attr;
u8 init_status;
bool es2_bridge;
es2_bridge = intf->ddbl1_manufacturer_id == ES2_DDBL1_MFR_ID &&
intf->ddbl1_product_id == ES2_DDBL1_PROD_ID;
/*
* Check if the module is ES2 or ES3, and choose attr number
* appropriately.
* FIXME: Remove ES2 support from the kernel entirely.
* ES2 bridges use T_TstSrcIncrement for the init status.
*
* FIXME: Remove ES2 support
*/
if (intf->ddbl1_manufacturer_id == ES2_DDBL1_MFR_ID &&
intf->ddbl1_product_id == ES2_DDBL1_PROD_ID)
if (es2_bridge)
attr = DME_ATTR_T_TST_SRC_INCREMENT;
else
attr = DME_ATTR_ES3_INIT_STATUS;
/* Read and clear boot status in ES3_INIT_STATUS */
ret = gb_svc_dme_peer_get(hd->svc, intf->interface_id, attr,
DME_ATTR_SELECTOR_INDEX, &value);
if (ret)
return ret;
/*
* A nonzero boot status indicates the module has finished
* booting. Clear it.
* A nonzero init status indicates the module has finished
* initializing.
*/
if (!value) {
dev_err(&intf->dev, "Module not ready yet\n");
dev_err(&intf->dev, "invalid init status\n");
return -ENODEV;
}
/*
* Check if the module needs to boot from UniPro.
* Check if the interface needs to boot over UniPro.
*
* For ES2: We need to check lowest 8 bits of 'value'.
* For ES3: We need to check highest 8 bits out of 32 of 'value'.
* FIXME: Remove ES2 support from the kernel entirely.
*
* FIXME: Remove ES2 support
*/
if (intf->ddbl1_manufacturer_id == ES2_DDBL1_MFR_ID &&
intf->ddbl1_product_id == ES2_DDBL1_PROD_ID)
if (es2_bridge)
init_status = value & 0xff;
else
init_status = value >> 24;
@ -68,6 +71,7 @@ static int gb_interface_read_and_clear_boot_status(struct gb_interface *intf)
init_status == DME_DIS_FALLBACK_UNIPRO_BOOT_STARTED)
intf->boot_over_unipro = true;
/* Clear the init status. */
return gb_svc_dme_peer_set(hd->svc, intf->interface_id, attr,
DME_ATTR_SELECTOR_INDEX, 0);
}
@ -210,9 +214,9 @@ int gb_interface_enable(struct gb_interface *intf)
int ret, size;
void *manifest;
ret = gb_interface_read_and_clear_boot_status(intf);
ret = gb_interface_read_and_clear_init_status(intf);
if (ret) {
dev_err(&intf->dev, "failed to clear boot status: %d\n", ret);
dev_err(&intf->dev, "failed to clear init status: %d\n", ret);
return ret;
}